York City Police are investigating the shooting death of Angel Hernandez, 20, of York, who they say was shot in the back just after 4 a.m. in the 500 block of West Philadelphia Street.

Ted Czech, York Daily Record/Sunday News

Update: In later statements, police said there was a "disagreement" sometime before the shooting, but they do not yet know when that occurred. A suspect has been arrested in the homicide.

A 20-year-old York man was the "intended target" when someone fired a gun at him, striking him in the back, and eventually leading to his death early Sunday morning, according to York City Police Lt. Troy Bankert.

Brandon Groff-Wood, 32, stands near a memorial in the 500 block of West Philadelphia Street for ...more

Brandon Groff-Wood, 32, stands near a memorial in the 500 block of West Philadelphia Street for Angel Hernandez, 20, of York, who police say was shot in the back there just after 4 a.m. Sunday.

Ted Czech, York Daily Record/Sunday News

Angel Hernandez was shot around 4 a.m. after a "disagreement" in the 500 block of West Philadelphia Street and was taken to York Hospital by a privately-owned vehicle, Bankert said.

Hernandez died just after 6 a.m. Sunday. An autopsy Monday morning determined his cause of death was a gunshot wound to the back, and the manner of death was homicide.

Groff-Wood said he and his husband heard several loud noises outside around 4 a.m. as they were getting ready to go to bed Sunday morning.

"I looked out my window and I didn't see anything," he said. "I wasn't sure if it was gunshots or a car backfiring."

Granadillo said she was sleeping, but her boyfriend heard the shots.

"I've been a nervous wreck; I haven't slept," she said, visibly shaking. "Let's hope they find this person. The kid (Hernandez) just turned 20 years old."

17th homicide

Sunday's fatal shooting was the 17th homicide of 2017 in York County, according to the York County Coroner's Office. The coroner's office said there were 17 homicides in the county in all of 2016.

How to help

From York City Police: "If anyone has any information relating to this incident, they are encouraged to call the York City Police Department at 717-846-1234 or text tips to 847-411 or download the York City PD App. Texting in tips is the best method of conveying information about this incident and it is anonymous."